An academic label for someone who adheres to the theories, or methods, of Karl Marx, who proved that society can be studied by science. The term is confused by a lot ignorant
asshats who are unable to
parse Marxism from small 'c' communism; the latter being a very specific type of society, whereas Marxism is more a way of understanding how the world is shaped by material conditions and the imperatives of class power, which are the real motor forces of history.